Dear sir can you guide me Urumqi airport to Zhengzhou city how long way by train and what is the train price

From the airport, you can take the airport shuttle bus to reach local railway station. Then you can find trains for Zhengzhou. The ticket price varies from 314 to 567 according to different seats you plan o take.
I think you can find detail information about the trains and the ticket prices on https://www.travelchinaguide.com/china-trains/.